TriLookup 2.22 Excel add-in with eleven powerful worksheet functions for 1, 2 and 3 variable lookup and interpolation (closest-value, linear, piecewise parabolic or hyperbolic, cubic spline) and polynomial curve fitting. Includes online help and example workbooks.
InterReg 3.2.2 InterReg allows you to do complex interpolation and regression calculations just with some point-and-click. So this program is not only for mathematics and engineers. Free for students and schools. Version 2 calculates with arbitrary precision.
FindGraph - a powerful graphing and curve-fitting tool for all your graph-related needs As an engineer, a scientist of a student of a technical college, you probably deal with graphs a lot more often than you’d like to. However, graphs are an integral part of any technical discipline, and it takes time to learn to plot, compare and read them quickly. If you are looking for a software tool that will greatly facilitate your graph-related activities, make sure you don’t miss FindGraph
DiffEngineX - an ultimate Excel spreadsheet comparison tool with tons of unique features! Comparing two similar Excel spreadsheets is a complex task, especially if they have hundreds of rows and columns. In this case, manual comparison becomes an exercise in futility and a potential source of errors that may lead to unwanted or even dangerous consequences. Therefore, if you need to compare two Excel documents containing scientific, statistical or financial data, the best way